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IF we have three 30KW motor, these motors are connected in
DOL, star-delta and VFD respectively, what will be the fuse
rating for the above three?

Answers were Sorted based on User's Feedback



IF we have three 30KW motor, these motors are connected in DOL, star-delta and VFD respectively, w..

Answer / k.prakashchandra

50 A rating and 100 A fusing

Is This Answer Correct ?    5 Yes 3 No

IF we have three 30KW motor, these motors are connected in DOL, star-delta and VFD respectively, w..

Answer / g.bhaskar reddy

IF MOTOR FUSE RATING IS 3 TO 4 TIMES OF THE MOTOR FULL
CURRENT.

Is This Answer Correct ?    2 Yes 1 No

IF we have three 30KW motor, these motors are connected in DOL, star-delta and VFD respectively, w..

Answer / raymondraju05@gmail.com

30kw motor full load 54amps starting current upend on type of rotor like(single,double,deep bar cage) so single cage 4 to 5 times, double cage 3 to 31/2 times, deep bar 2 to 3 time at the time of starting. Now we can decide to witch of motor used as say above.

Is This Answer Correct ?    0 Yes 0 No

IF we have three 30KW motor, these motors are connected in DOL, star-delta and VFD respectively, w..

Answer / gak

30KW DOL FLC= 52.5A, 30KW FASD FLC= 31.5A So 63A Fuse for
DOL & 50A for FASD

Is This Answer Correct ?    0 Yes 1 No

IF we have three 30KW motor, these motors are connected in DOL, star-delta and VFD respectively, w..

Answer / s k deo

First pl. note down Voltage level

Is This Answer Correct ?    1 Yes 3 No

IF we have three 30KW motor, these motors are connected in DOL, star-delta and VFD respectively, w..

Answer / sanduri ramesh babu

3-phase 30kw means 40.21Hp, so rated current is 60amps. We
can use 60amp rating.

Is This Answer Correct ?    0 Yes 3 No

IF we have three 30KW motor, these motors are connected in DOL, star-delta and VFD respectively, w..

Answer / sudhakar

30Kw motor taken 60amp's so we arange 350amp's fuse rating

Is This Answer Correct ?    1 Yes 4 No

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